SAN DIEGO COUNTY WATER AUTHORITY

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Los Angeles Department of Water and
Power Seawater Desalination Update by Alvin
Bautista, P.E. October 2007
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Seawater Desalination Update

• MWD has included desalination in its Integrated
  Resources Plan - 250/AF incentive offered
• LADWP began evaluations in 2002 (Fatal Flaw
  Analysis, Optimization Study, Brine Discharge
  Analysis, incl. use of Hyperion outfall)
• Due diligence requires a site-specific evaluation
  through detailed pilot testing at the Scattergood
  site
• Water System is conducting a small-scale pilot
  project at Scattergood to evaluate various
  parameters

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Seawater Desalination Update

• Pilot project focus is on data and information
  collection (to provide answers that can serve as
  basis for future decisions)
• Grant funding from the Bureau of Reclamation and
  Department of Water Resources (Proposition 50)
  acquired to fund approx. 50 of the pilot
  projects costs
• Pilot will be conducted in a manner that will not
  solely depend on power plant remaining in service

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(No Transcript)
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LADWP Proposed Desalination Project Site
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Seawater Desalination and
City of Los Angeles Water
Resources

• 85 of Los Angeles water supply is imported
• 40 of Los Angeles Aqueduct water has been
  redirected for environmental restoration
• City population expected to increase by 370,000
  to over 4.3 million residents by 2025
• Continuous efforts in recycled water supply
  development
• LADWP success in water conservation has kept
  demands low and imported supplies sustainable

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Seawater Desalination and
City of Los Angeles Water
Resources
FY 06-07

• 85 percent of Los Angeles water supply is
  imported

2030
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Seawater Desalination and
City of Los Angeles Water
Resources

• 40 of Los Angeles Aqueduct water has been
  committed for environmental restoration

184,000 AF reduction 40 of historic supply
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CONSERVATIONS IMPACT ON CITY
OF LOS ANGELES WATER USE
Water use is the same today as it was 25 years
ago despite an increase in population of nearly
1 million people.
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Seawater DesalinationOpportunities

• Work cooperatively - regional and statewide to
  develop a new local resource
• Develop an objective process for permitting
  future local facilities
• Provide water supply reliability through a
  drought-proof supply
• Improve technology through more RD gain
  efficiency and reduce cost

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Summary

• LADWP is evaluating desalination as a potential
  water resource to provide reliability and partly
  compensate for supplies reallocated to the
  environment
• The pilot research project at Scattergood will
  provide needed data and information that can be
  used to make future informed decisions
• The pilot project will evaluate the most feasible
  options for developing desalination

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Summary

• Beyond the pilot research study, no decision has
  been made on the future of seawater desalination
  for Los Angeles
• LADWP is now undertaking prudent research and has
  initiated dialogue with stakeholders
• Thank you.